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(No Model.)

E. M. DOIG.

LUBRIGATOR POR TRoLLBYs.

No. 466,737. Patented Jan. 5, 1892.

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UNITED STATES APATENT OFFICE.

EDwIN M. DOIG, OE DENVER, COLORADO, AssIGNoE OE ONE-EouE'rI-I To WILLIAM J. MCKEELEY, OE sAME PLACE.

LU BRICATOR FO RATROLLEYS.

SPECIFICATION forming part of Letters Patent No. 466,737', dated January 5, 1892. Applicationrled August 17, 1891. Serial No. 402,933. (No model.)

T all whom t 'may concern:

Be it known that I, EDWIN M. DOIG, a citizen of the United States of America, residing at Denver, in the county of Arapahoe and State of Colorado, have invented cert-ain new and useful Improvements in Self-@lling Trolleys; and I do declare the following to be a full, clear, and exact descriptionvof the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a specification.

My invention relates to improvements in trolleys for use in electric overhead railway systems; and the object of the invention is to automatically lubricate the trolley-bearings, and thus add to their efliciency and durability.

In my improved construction the trolley Wheel or pulley is made rigid on the spindle or axle, whose extremities pass through small chambers or reservoirs lled with some suitable lubricant. The improvement will be fully understood by reference to the accompanying drawings in connection with the description hereinafter given.

In the drawings, Figure l is a longitudinal vertical section taken through the trolley wheel and frame. Fig. 2 is a side elevation of the same.

In the views, similar reference-characters indicating corresponding parts or elements of the mechanism, let the numeral designate the socket, adapted to receive the upper extremity of the arm, which forms the medium through which the current is carried to the car. This socket is formed of metal, preferably copper, and terminates at its upper extremity in a bifurcated frame of suitable general shape to receive the trolley and permit freedom of rotation. Vithin this frame is journaled the spindle, to which the trolley is rigidly secured, as bya set-screw or in any other suitable manner. The sides 2O of the frame in which the bearings for the spindle are formed are double the greater part of their length and consist of two plates 25,

'inclosing a reservoir or chamber 30, closed at part of this the top and bottom and open only at the spincile-bearings. The bearing proper for each journal of the spindle consists ofa removable casing 35, of cylindrical shape, screwed into the inner plate 25 of each side of the frame 55 and fashioned to lit nicelyover the end of the spindle, upon which it forms a cap, its outer extremity being formed into a screw-head provided with the usual groove and overlapping the surrounding outer plate of the frame. 6o

The opening of the outer plate 25 on each side of the frame is smooth, as is also the outer portion of the bushing-cap, which is adapted to slip into said opening and through the oil-reservoir and screw'through the inner 6 5 plate to engagement with the hub et() of the trolley 45.

Each bushing-cap 35 is provided with an opening 8,formed in its shell above the spindle-journal, and another opening 9, formed 7o therein below said journal, as shown in the drawings. The oil or other lubricant passes from the chamber through these openings to the journal. In order to better distribute the lubricant over t'he journals of the spin- 75 die, the shell of each bushing-cap is provided with an interiorly-formed groove 5 ,leading from opening 8 toward the hub of the trolley, but terminating before reaching the inner extremity of the bushing-sleeve. The 8o lower portion of each oil-chamber is provided at a short distance from the bushing with short spines or projections 6, extending from the walls of the chamber and adapted to form a support for packing if it should at any time be thought necessary or desirable to use the same.

Each reservoir is supplied with lubricating material through a suitable aperture formed in the upper part of the shell and normally 9o closed by a spring cork or plug, 2l being the stopper, 22 the spring, and 23 lthe screw or rivet holding the same in place.

It will be observed from the foregoing description that the oil-chambers are tightly closed, except where the apertures are formed leading to the spindle-journals; also, that after the lubricant reaches these journals it is so closely confined that there is little or no chance for it to escape therefrom. roo

In, Y Y g Y *Y I Theperiphery of the trolley is grooved after the ordinary manner, as shown at 50, and adapted to engage the overhead Wire carrying the current, which is transmitted through the trolley and its supporting-arm to the ear.

The general formation of the trolley-frame is believed to be well adapted to subserve the requirements of'a device of this class.

Having thus described my invention, what l claim isl. The combination, with a trolley-Wheel made fast to its spindle, of a frame in which the spindle rotates, said frame being provided with oil-chambers on each side, one surrounding each spindle-journal, removable bushings surrounding the journals and screwed into openings in the frame and passing through the oil-chambers, and openings in the bushing permitting the passage of oil from the chambers :to the journals, substantially as described.

2. The combination, with a trolley-Wheel, of a frame provided with oil-chambers, a spindle to Which the trolley is made fast, bearings for the spindle-journals, consisting of bushing-caps fitting thereover and passing through the oil-chambers, and apertures leading from said chambers to the journals, substantially as described.

3. The combination, with a trolley-Wheel made fast to its spindle and provided With a shouldered hub, of a frame provided with oilreservoirs, bearings for the spindle-journals, consisting of bushing-caps fitting thereover, passing through the oil-chambers, and engaging the shouldered hub of the trolley, and openings leading from the oilchambers through the bushing to the journals, substantially as described.

4;. The combination, with a trolley made fast on its spindle, of a frame provided with oil-chambers, bearings for the spindle-journals, consisting of bushing-sleeves passing through the oil-chambers and having openings leading therefrom to the journals, and also a groove extending from one or more of said openings along the journal toward the hub of the trolley, substantially as described.

In testimony whereof I affix mysignature in presenceof two Witnesses.

EDWIN M. DOIG.

Witnesses:

WM. MoCoNNnLL, G. J. ROLLANDET. 

